To cite package ‘qlifetable’ in publications use:

  Pavía J, Lledó J (2024). _qlifetable: Managing and Building of
  Quarterly Life Tables_. R package version 0.0.2-5,
  <https://CRAN.R-project.org/package=qlifetable>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {qlifetable: Managing and Building of Quarterly Life Tables},
    author = {Jose M. Pavía and Josep Lledó},
    year = {2024},
    note = {R package version 0.0.2-5},
    url = {https://CRAN.R-project.org/package=qlifetable},
  }